HTML Viewer

Auto-run

Editor

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, 
  initial-scale=1.0">
  <title>HTML Viewer</title>
  <style>
    body {
      font-family: system-ui, -apple-system, sans-serif;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      height: 100vh;
      margin: 0;
      background-color:  #f8fafc;
      color:  #334155;
    }
    h1 {
      color:  #2563eb;
    }
    button {
      padding: 10px 20px;
      font-size: 16px;
      background-color:  #f59e0b;
      color: black;

Preview

HTML Viewer & Editor

View, edit, and preview HTML, CSS, and JavaScript code online instantly.

How to Use the HTML Viewer

1. Input Code

Type or paste your HTML, CSS, and JS code into the editor.

2. Live Preview

See the changes reflect instantly in the preview pane.

3. Copy or Download

Copy the code or download it as an HTML file with one click.

HTML Viewer Frequently Asked Questions

Is my HTML code sent to any server?

No, all code processing and previewing happen entirely within your browser. We do not store or send your code to any server, ensuring complete privacy.

Can I use CSS and JavaScript?

Yes, you can include CSS inside <style> tags and JavaScript inside <script> tags within your HTML document.

How do I stop the preview from refreshing on every keystroke?

You can uncheck the 'Auto-run' option in the toolbar. This allows you to type your code and only update the preview manually when you click 'Run Code'.

Does this HTML Viewer support external libraries like Bootstrap or Tailwind?

Yes, you can load external libraries by adding their CDN links into the <head> section of your HTML code.

Can I use this tool on a mobile device?

Yes, the editor is responsive and works on mobile, though larger screens provide a much better coding experience due to the split-screen layout.

What happens if I write malicious JavaScript code?

The preview runs in a sandboxed environment providing a layer of security, but since the code executes in your browser, it only affects your own session.

How can I export my work?

You can use the 'Download HTML' button to save the code as an index.html file on your device to work on later or host.

Is there a limit to how large the HTML code can be?

There is no theoretical limit imposed by us, but extremely large files (hundreds of megabytes) might slow down your browser during rendering.

Why do some iframes not work inside the preview?

Some websites block themselves from being embedded inside iframes for security reasons (using X-Frame-Options headers). This is a security restriction from the target site.

Does the editor support auto-completion and syntax highlighting?

Yes, we use an advanced editor built on the same technology as VS Code, which provides syntax highlighting, auto tag closing, and code formatting.